Fiddler AI raised $30 million in Series C funding as it pushes to build what it calls a neutral “control plane” for compound AI systems that increasingly rely on autonomous agents. The round was led by RPS Ventures, with participation from existing investors Lightspeed Venture Partners, Lux Capital, Insight Partners, Capgemini Ventures, Dallas VC, Dentsu Ventures, and Mozilla Ventures, as well as new strategic investors LG Technology Ventures, Benhamou Global Ventures, and LDV Partners. The financing brings Fiddler’s total funding to $100 million.
The Palo Alto-based company positions its platform as enterprise infrastructure for governance, observability, and security as agentic workflows move from experiments into business-critical production use. Fiddler said its control plane will provide standardized telemetry, reliable evaluation, continuous monitoring, enforceable policy, and auditable governance across the AI lifecycle, with an emphasis on visibility into multi-step agent workflows spanning models, tools, and external APIs.
Fiddler framed the opportunity in terms of a widening governance gap, arguing that agent failures can create regulatory, legal, and reputational exposure, particularly in regulated sectors with strict oversight requirements. The company said this environment is driving adoption, noting revenue growth of more than 4x over the last 18 months and highlighting recent milestones, including achieving AWS Pattern Partners status and being named the #1 company in AI Agent Security & Risk Management by CB Insights.
The company also leaned into differentiation versus narrower point solutions, describing a “batteries included” approach that aims to avoid stitching together separate debugging, monitoring, and evaluation tools. Fiddler said it uses proprietary trust models to deliver accuracy, safety, and compliance controls out of the box, and that its platform supports secure deployment across cloud and VPC environments.
Fiddler was founded in 2018 and said the new capital will be used to scale further across regulated industries such as healthcare, financial services, and insurance, while deepening integrations across the broader AI ecosystem.
KEY QUOTES
“The explosion of AI tools has created a significant gap in enterprise governance. Companies are deploying agents that interact with customers and make consequential decisions, but they’re monitoring them with fragmented point solutions built for simpler, deterministic use cases. A single agentic workflow can involve dozens of handoffs between models, tools, and APIs—each one a potential point of failure. Fiddler is the first company to deliver a true control plane that provides complete visibility into what agents are doing, contextual intelligence about why they’re behaving that way, and real-time controls to enforce policy and prevent catastrophic failures. That category-defining position is why we led this round.”
Timothy Murphy, Partner at RPS Ventures
”Every major platform shift requires new infrastructure. When companies moved to the cloud, they needed orchestration layers. As they deploy autonomous agents, they need a control plane. Our years building trust infrastructure gave us the foundation to solve this—understanding not just what agents do, but why they do it. That’s the difference between monitoring tools and mission-critical infrastructure.”
Krishna Gade, co-founder and CEO of Fiddler
“Fiddler has delivered unified observability, protection, and governance across agents and predictive models, making it fundamental to our AI strategy. We are especially looking forward to the upcoming rollout of the control plane and the intelligent orchestration it will bring as our AI footprint grows.”
Karthik Rao, CEO of Nielsen
